"MSF is appalled that again a health structure and staff are targeted after responding to provide life-saving treatment to wounded victims of an indiscriminate bombing campaign," MSF director of operations Brice de le Vingne said.

It is not yet clear whether the bombs came from the American-led coalition, Russia or some other group.

Yesterday the United States Defence Department said it would redact the report into last month's hospital bombing in Afghanistan, meaning some details as to why a hospital was targeted may remain secret.